Glass-grinding disk.



W. B. MAYO.

GLASS GRINDING DISK.

APPLICATION FILED JAI.3.'1911.

wiinesses- I Vow, Z. M

[mien tor witliam B. Maya Patented Mar. 14, 1911.

- WULEDQZV dtt orney UNITED OFFICE.

WILLIAM B. MAYO, OF HAMILTON, OHIO, ASSIGNOR TO THE HOO'VEN, OWENS,RENTSCHLER COMPANY, OF HAMILTON, OHIO.

GLASS-GRINDING DISK.

Specification of Letters Patent.

Patented Mar. 14, 1911.

Application filed January 3, 1911. Serial No. 600,500.

To all whom it may concern:

Be it known that I, VVILLIAM B. MAYo, a citizen of the United States,residing at Hamilton, Butler county, Ohio, have invented certain new anduseful Improvements in Glass-Grinding Disks, of which the following is aspecification.

This invention pertains to lIHP'lOVBIHGHlS in the grinding disks ofglass grinding machines of that type in which a sheet of glass issecured to the surface of a rotating table and ground upon its uppersurface by means of a suspended disk free for rotation and set eccentricto the table, the lower face of the disk being armed with metallicrunnerblocks, abrasive material being applied to the glass while beingoperated upon by the runner-blocks of the disk.

The present invention relates to the system by which the runner-blocksare secured to the disk, the aim of the invention being to provide forequipping the disk with new or repaired runner-blocks withoutnecessitating the removal of the disk from the machine.

The invention will be readily understood from the following descriptiontaken in connection with the accompanying drawing in which Fi ure 1 is aview of the lower face of a grin ing disk exemplifying my invention, thedisk being illustrated as but partially equipped with the runner-blocks.Fig. 2 an edge view of the disk; and Fig. 3, a perspective view of oneof the runner-blocks and a pair of the clamps.

In the drawing :-1, indicates the usual grinding disk: 2, a series ofparallel dovetail grooves extending across the lower face of the disk:3, a series of clamp-blocks at the face of the disk and extendingdiametrically across the disk at right angles to the grooves, therebeing one of these blocks for each groove: 4, dovetails projecting fromthe top of each block and fitting and engaging the appropriate groovesso that the blocks may be held snugly in their grooves: 5, fastenings,as screws, securing this series of clampblocks against movement in theirgrooves: 6, other similar clamp-blocks disposed in the grooves but leftfree for sliding motion in the grooves, each of the grooves at each sideof the central series of blocks being provided with a number of thesliding clampblocks; 7, a bolt passing through all of the clamp-blockspertaining to a given groove, and serving as means by which all of thesliding clamp-blocks may be drawntoward the central series ofclamp-blocks: 8, dovetail jaws formed on the lower faces of all theclamp-blocks, the faces of these jaws ex tending in a direction at rightangles to the grooves: 9, the runner-bars, the same having their tops ofdovetail cross-section to be properly engaged by the jaws 8 of theclamp-blocks: and 10, the grinding bosses projecting down from the basesof the runner-bars and having lower surfaces to act upon the glass.

The runner-bars may be of usual material and general dimensions, and itis recommended that each runner-bar carry about six of the grindingbosses. As the bars are easily broken-between the bosses they may bevaried in length to properly fill out the lines of runner-bars in thedisk.

The clamp-blocks are to be made with accuracy, and the verticaldimension of the runner-bars is, by proper machining or grinding, to bemade uniform for all of the runnerblocks to be employed.

The disk being idle, and empty of runner-bars, runner-bars are to bepoked into the spaces between the fixed central line of clamp-blocks andthe contiguous lines of clamp-blocks, enough runner-bars being appliedto extend from edge to edge of the disk. In a similar manner the spacesbetween all of the other clamp-blocks are to be filled with runner-bars,after which the bolts are to be tightened up in order to clamp all ofthe runner-bars firmly to the disk. The fixing of the central line ofclamp-blocks to the disk is not at all essential, but it is preferableas it provides for the other clamp-blocks being drawn toward a fixeddiametrical line of the disk instead of leaving all of the clamp-blocksin a given groove to move in one direction. It is advisable, in placingthe runner-bars in the clamps, to see that the abutting of the barstakes place within a pair of clamp-blocks instead of between two pairsof clampblocks, thus insuring the security of the runner-bars even if abar breaks between grinding bosses, and for the same reason it isadvisable to place the grooves but short distances from each other sothat a 4. Mem

runner-bar needs to stretch but a very short distance from one of itsclamps to the next clamp.

I claim 1. A glass grinding disk comprising, a disk, a series of slidingclamp-blocks carried by the lower face of the disk, means for forcingthe clamp-blocks toward each other, and runner-bars clamped between theclamp-blocks, combined substantially as set forth.

2. A glass grinding disk comprising, a disk provided with a series ofparallel grooves in its under face, clamp-blocks arranged in series toslide in each set of grooves, means for drawing the clampblocks of aseries toward each other, and runner-bars clamped between theclampblocks, combined substantially as set forth.

3. A glass grinding disk comprising, a disk provided with a series ofparallel grooves in its under face, clamp-blocks arranged in series toslide in each set of grooves, means for drawing the clampblocks of aseries toward each other, runnerbars clamped between the clamp-blocks,and means for securing one clamp-block in each series against sliding inits groove, combined substantially as set forth.

4. A glass grinding disk comprising, a disk provided with dovetailgrooves in its lower face, clamp-blocks having top dovetailedprojections slidingly engaging said grooves, a bolt passing through theseries of clamp-blocks in each groove, dovetail jaws projecting downfrom the clamp=blocks, and runner-bars dovetailed in cross-section to beengaged by the jaws of the clamp-blocks, combined substantially as setforth.

WILLIAM B. MAYO.

Witnesses:

M. S. BELDEN, Gno. JOHNSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, 1L0.

